Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net earnings (loss)	$ (509)	$ (459)
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	1,442	1,669
Stock-based compensation	160	92
Realized (gain) loss on foreign currency forwards	(34)	(1)
(Gain) loss on equity securities	100
Deferred income tax expense (benefit)	(567)	(369)
Goodwill and Intangible Asset Impairment	544
Other noncash charges (credits), net	69	(110)
Changes in operating assets and liabilities
Current and other assets	(419)	(501)
Payables and other liabilities	1,330	1,623
Net cash provided (used) by operating activities	2,116	1,944
Cash flows from investing activities:
Capital expended for property and equipment and capitalized software	(639)	(532)
Purchases of short-term marketable securities and other investments	(1,714)	(1,713)
Sales of short-term marketable securities	1,692	921
Acquisitions by subsidiary, net of cash acquired	(40)	(169)
Other, net	41	8
Net cash provided (used) by investing activities	(660)	(1,485)
Cash flows from financing activities:
Borrowings of debt	177	1,624
Repayments of debt	(681)	(594)
Shares issued by subsidiary	138	180
Shares repurchased by subsidiary	(620)	(154)
Dividends paid by subsidiary	(117)	(110)
Proceeds from exercise of equity awards and employee stock purchase plan	1	5
Taxes paid in lieu of shares issued for stock-based compensation		(9)
Other financing activities, net	(65)	(18)
Net cash provided (used) by financing activities	(1,167)	924
Effect of foreign exchange rates on cash, and cash equivalents and restricted cash	(119)	143
Net increase (decrease) in cash, and cash equivalents and restricted cash	170	1,526
Cash and cash equivalents and restricted cash at beginning of period	3,031	1,872
Cash and cash equivalents and restricted cash at end of period	$ 3,201	$ 3,398

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Reference 10: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686

+ Details

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

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- Definition

Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

+ References

No definition available.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

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